The New York Times and BusinessWeek are bullish on the Sprint Xohm launch in Baltimore: Two veteran tech reporters, who have had time to see it all and be cynical about it all, are fairly positive about the Sprint launch of WiMax. This is the first city-wide launch in the U.S. for regular signups, and one of the largest networks now operating in the world. (As far as I can tell, Seoul's WiMax-compatible WiBro network is still not designed for 100-percent city coverage, but is boutique.)
Bob Tedeschi at the Times found solid performance wherever he tested, but he notes the caveat that the network is nearly empty at the moment. While comparing Sprint's promised up to 4 Mbps down and 1.5 Mbps up, he uses an outdated number for AT&T's 3G network. AT&T used to give out the numbers he states, but as of their HSUPA upgrade a few months ago, they claim 700 Kbps to 1.7 Mbps downstream and 500 Kbps to 1.2 Mbps upstream. I haven't had the opportunity to test these rates, but this is their current claim, not what Tedeschi reported.
Tedeschi checked out various adapters and devices, including the Nokia N810 WiMax Edition ($500) that just went on sale. He had problems with video playback, but that could have been the network or the phone's operating system or the site he was accessing. He did like the quality of VoIP calls.
BusinessWeek's Stephen Wildstrom was more enthusiastic, seeing rates of 3 Mbps down and 500 Kbps to 1 Mbps up, and was able to watch Hulu.com streaming content as a passenger in a moving vehicle.
Both reporters note that WiMax seems to improve on Wi-Fi and cell data service in both speed (as 3 Mbps is faster than most Wi-Fi hotspots, and much faster than the average of most 3G networks), availability (for Wi-Fi), and cost (for 3G).
Subscriptions are a little complicated: $30 for roaming, $35 for home, $45 for a combined plan, and $60 for multiple devices, if I have all that right. Subscribers also need to buy a dongle, card, adapter, or CPE (home bridge), which seem to run under $100. Adapters will eventually be built into Intel-designed laptops.